Make onload async

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index a68d8782bbfe06f0d422d6835e929267e1d24ffb..c6e2f672c710886b0aedd5a592f942b78a6537d0 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -887,6 +887,7 @@ public:
     enum LoadEventProgress {
         LoadEventNotRun,
         LoadEventTried,
+        LoadEventScheduled,
         LoadEventInProgress,
         LoadEventCompleted,
         BeforeUnloadEventInProgress,
@@ -896,7 +897,7 @@ public:
         UnloadEventHandled
     };
     bool loadEventStillNeeded() const { return m_loadEventProgress == LoadEventNotRun; }
-    bool processingLoadEvent() const { return m_loadEventProgress == LoadEventInProgress; }
+    bool processingLoadEvent() const { return m_loadEventProgress == LoadEventScheduled || m_loadEventProgress == LoadEventInProgress; }
     bool loadEventFinished() const { return m_loadEventProgress >= LoadEventCompleted; }
     bool unloadStarted() const { return m_loadEventProgress >= PageHideInProgress; }
 
@@ -923,7 +924,7 @@ public:
     // Used to allow element that loads data without going through a FrameLoader to delay the 'load' event.
     void incrementLoadEventDelayCount() { ++m_loadEventDelayCount; }
     void decrementLoadEventDelayCount();
-    void checkLoadEventSoon();
+    void checkLoadEvent();
     bool isDelayingLoadEvent();
     void loadPluginsSoon();
 
@@ -1128,7 +1129,7 @@ private:
 
     void executeScriptsWaitingForResourcesTimerFired(Timer<Document>*);
 
-    void loadEventDelayTimerFired(Timer<Document>*);
+    void loadEventTimerFired(Timer<Document>*);
     void pluginLoadingTimerFired(Timer<Document>*);
 
     PageVisibilityState pageVisibilityState() const;
@@ -1329,7 +1330,7 @@ private:
     WillBeHeapVector<RefPtrWillBeMember<Element> > m_topLayerElements;
 
     int m_loadEventDelayCount;
-    Timer<Document> m_loadEventDelayTimer;
+    Timer<Document> m_loadEventTimer;
     Timer<Document> m_pluginLoadingTimer;
 
     ViewportDescription m_viewportDescription;